 | | Report (issue) | | short prismatic Ametista do Sul, Brazil Artigas, Uruguay Cavities in sedimentary rocks less than...found at La Soberana Mine in Estancia La Soberana, Uruguay. Reinhard Balzer photo Facing page, left: High-salinity...Grande do Sul, Brazil, and in neighboring Artigas, Uruguay. Other large igneous provinces related to...the amethyst geodes at Ametista do Sul and at Artigas; thus indicating that it is not the chemical composition...amethyst geode deposits in southern Brazil and Uruguay explains their uniqueness. Origins 13 An Overview |  | | Catalog/List | | inclusions, amethyst intermixed with citrine, red hematite, more green celadonite, then amethyst again, and...Municipality, Western BoyacĂĄ Province, BoyacĂĄ Department, Colombia 16 cm tall x 14.5 cm wide 38 39...Calcite on Amethyst with Chalcopyrite, Artigas, Artigas Department, Uruguay 16 cm tall x 26.8 cm wide 43 |  | | Journal (article/letter/editorial) | | Library] at 11:09 02 September 2017 Figure 6: Hematite rose, Sao Juliao mine near Dom Bosco, Ouro Preto...Kenneth Croft photo. Figure 18: Amethyst, Artigas, Uruguay. Specimen is 4 inches tall. Kenneth Croft...11:09 02 September 2017 Figure 31: Amethyst, Artigas, Uruguay. Specimen is IVi inches tall. Kenneth Croft...X 2Vi inches. Earl Lewis photo. 3 Figure 34: Hematite cubes, Dom Bosco mine, Ouro Preto, Minas Gerais...(center): Left, amethyst cast after quartz, Artigas, Uruguay. Right, apophyllite, Poona, India. Each specimen |  | | Catalog/List | | concentrate on Brazil and Peru with occasional trips to Uruguay, Chile, and Colombia. Besides buying, he started...Nikolaevskiy Mine, Dalnegorsk, Russia, 1993. "RPG," Artigas, Uruguay, acquired 2008. RHC #8000. Record and Rocks.............................................198 Uruguay .................................................often and are friends with the local sherifâs department. You igure the odds of extracting any more specimens...Rhodochrosite Moanda Mine, Moanda, LĂ©boumbi-Leyou Department, Haut-OgoouĂ© Province, Gabon âA thin angular |  | | Journal (issue) | | remained forgotten and not analyzed until recently. Hematite pseudo after magnetite, Volcan Payun Matru, Malargiie...Amethyst and calcite, La Bo Isa, Artigas, of poldervaartite). The new Uruguay specimens are more attractive...better luster) from Artigas in Uruguay. Recently specimens have come from several Artigas deposits with good...crystals on the calcite. Specimens from La Bolsa (Artigas, Uruguay) have irregular patches of "sugar" arresting...from Cantera Norte (Paraje, Catalan Grande, Artigas, Uruguay) had a string of minute quartz crystals growing |  | | Show/Event (guide) | | BECKER STONES LLC Carlos Catala 372 Artigas, Artigas 55000 Uruguay Tel: +5-984-773-1666 www.beckerstones...Booth#: TNW1 Amethysts and other raw materials from Uruguay. BEST IN GEMS, INC. 6724 Perimeter Loop Rd. #307...PANIZZA MINERALS LLC Juan B. Torrej 456 Artigas, Artigas 55000 Uruguay Tel: +5-989-951-7047 Booth#: TNW3...URUMINING S.A Av. Rivera 7918 Carasco, Canelones Uruguay Tel: +59-895-210-179 http://www.urumining.com.uy...TW10, TW12 Amethysts, meteorites and geodes from Uruguay. LIST OF EXHIBITORS SPENCER OPAL MINES 27 Opal |  | | Journal (article/letter/editorial) | | Calamine Melaconite Kaolin Melanochalcite Lithomarge Hematite Halloysite Magnetite Allophane Limonite Hyaloallophane...completely changed to the amorphous form, "melaconite". Hematite: var. SpecuIarite: also massive, plated and micaceous...luster; all four are aBBOdated- with magnetite and hematite. GI,U"JIBt: Sparingly in trapezohedrons ,changed...border, on Uruguayian territory. The trade names, Uruguay Amethysts and Siberian Amethysts, are accepted...Chico and Catalan Grande near the larger town of Artigas, very near the frontier. Near the Catalans is also |  | Arena, K.R., Hartmann, L.A., Baggio, S.B. (2014) Geological controls of copper, gold and silver in the Serra Geral Group, Realeza region, ParanĂĄ, Brazil. Ore Geology Reviews, 63. 178-200 doi:10.1016/j.oregeorev.2014.05.005 | Journal (article/letter/editorial) | | fluid encounters an oxidized environment such as hematite-bearing sedimentary rocks or oxygenated meteoric...meteoric water. Nevertheless, the stability field of hematite is very large ED and extends down to equilibration...associated with hematite may result in oxidizing conditions. It is more likely that hematite- PT magnetite...geodes from Los Catalanes gemological district, Artigas, Uruguay, southern ParanĂĄ Magmatic-Province. Journal...QuaraĂ and Los Catalanes districts, Brazil and Uruguay. Geological Magazine 147, 954-970. Hartmann, L |  | Baggio, SĂ©rgio Benjamin, Hartmann, LĂ©o Afraneo, Lazarov, Marina, Massonne, Hans-Joachim, Opitz, Joachim, Theye, Thomas, Viefhaus, Tillmann (2018) Origin of native copper in the ParanĂĄ volcanic province, Brazil, integrating Cu stable isotopes in a multi-analytical approach. Mineralium Deposita, 53 (3) 417-434 doi:10.1007/s00126-017-0748-2 | Journal (article/letter/editorial) | | America, mainly Brazil but including portions of Uruguay, Argentina, and Paraguay (Fig. 1). The volumes...3c). In particular, a reddish halo containing hematite can be observed (Fig. 3d). Clinopyroxene is commonly...spectra (Fig. 5gâj), in which quartz, magnetite, hematite, and zeolite (heulandite) were also identified...(sample PD1). d Magnetite with reddish halo of hematite (center and left), reflected light (sample PD1)...analyses performed on smectite aggregates display hematite (along the rim) and smectite (Fig. 10aâc). Smectite |  | | Catalog/List | | Minshull Chief Operating Officer DIRECTORY FOR DEPARTMENT SPECIALISTS AND SERVICES COINS & CURRENCY COINS...V.P. Auction Operations Norma@HA.com CREDIT DEPARTMENT Marti Korver, Ext 1248 Marti@HA.com Eric Thomas...online. 53001ââ AMETHYST PORCUPINE Artigas, Artigas Department, Uruguay An Amethyst âporcupineâ of colorless...District, Castrovirreyna Province, Huancavelica Department, Peru Over 14 colorless Japan-Law Quartz twins...District, Castrovirreyna Province, Huancavelica Department, Peru An unusual association: a large Japan-Law |  | | Journal (article/letter/editorial) | | Scovil photo. MarcWApril: Amethyst and calcite, Artigas, Uruguay. Rock H. Currier specimen, Harold and Erica...Jeff Scovil photo. Adularia, Michigan, I10 Agate, Uruguay, 94 Ajoite, Arizona, 23 Albite, California, 156;...46 Amethyst, Agate, and Calcite âSkunksâ from Uruguay, R. H. Currier, 94-105 Ankerite, Missouri, 421;...Michigan, 110; Missouri, 370-77, 379-82, 404, 421; Uruguay, 94: Wiscon- sin, 346 Caledonite, Arizona, 26...H., Amethyst, Agate, and Calcite âSkunksâ from Uruguay, 94-105; Calcite and Marcasite Specimens from the |  | | Journal (article/letter/editorial) | | photo. July/August: Amethyst and calcite, Artigas, Uruguay. Rock Currier specimen, Jeff Scovil photo... 129-31; Locality Information for Quartz with Hematite from China, J. Tron, 412-13 Colombia, see Andes...Who in Mineral Names Helvite, Jinlong, 412-1 3 Hematite, Colorado, 314; Jinlong, 412-13; Michigan, 344...Hampshire, 417 Locality Information for Quartz with Hematite from China, J. Tron, 412-13 Lollingite, California |  | | Catalog/List | | Heritage Auctions, Inc. 15021 Natural History Department Steve Ivy CEO Co-Chairman of the Board David...Courtney Case, Ext. 1293 CourtneyC@HA.com Credit Department Marti Korver, Ext 1248 Marti@HA.com Michael... 38002ââ AMETHYST CAST AFTER CALCITE Artigas, Artigas Department, Uruguay Perched on top of a mound of rich...âPORTA JOIAâ WITH CALCITE CRYSTAL Artigas, Artigas Department, Uruguay A âporta joiaâ is a âjewel boxâ...crystals, this very large âporta joiaâ comes from Artigas, Uruguay. Included within this âdiamondâ shaped geode |  | | Show/Event (guide) | | semi-precious stones and beads. URUGUAY MINERALS By Pass 354 Artigas, Artigas 55000 Uruguay Tel: 598 477 33073 www...Booth#: Ballroom E17 Tumbled stones, magnetic hematite, pewter, home decor, minerals, amethysts, agates |  | Fritsch, Emmanuel, Rondeau, Benjamin, Devouard, Bertrand, Pinsault, Lauriane, Latouche, Camille (2017) Why Are Some Crystals Gem Quality? Crystal Growth Considerations On the âGem Factorâ. The Canadian Mineralogist, 55 (4) 521-533 doi:10.3749/canmin.1700013 | Journal (article/letter/editorial) | | MINERALOGIST FIG. 9. These goethite (yellow) and hematite (red) discoidal inclusions formed by rapid growth...ïŹbrous discs, or discoids. For example, discoids of hematite and goethite in fractures of rock crystal quartz...geodes from Los Catalanes gemological district, Artigas, Uruguay, southern ParanaÌ Magmatic Province. Journal...geodes in the Los Catalanes gemological district, Uruguay, southernmost Parana volcanic province. Mineralium |  | | Journal (article/letter/editorial) | | University of Idaho, Moscow, Idaho 83844-2339, U.S.A. Department of Geological Sciences, University of Idaho,...suggesting an oxygen fugacity slightly below the hematite-magnetite buffer. This estimate is consistent...(2010) The genesis of the amethyst geodes at Artigas (Uruguay) and the paleohydrology of the GuaranĂ aquifer: |  | | Journal (article/letter/editorial) | | specimens have been found in Gachala, Cundinamarca department (Colombia), formed by two crystals twinned according... The specimens from the Chessy mine in Rhone department (France) have been known for a long time, probably...2016). Hematite pseudomorphs after magnetite The transformation of magnetite into hematite is called...transformation, Smithsonite pseudomorphs after calcite from hematite to magnetite, can also occur, although it is Another...smithsonite The transformation of magnetite to hematite can be pseudomorphs after calcite. Blum expressed |  | | Catalog/List | | inside a cavity within an odd matrix of massive Hematite. The sizable 1.68 inches (4.26 cm) Malachite âeggâ...images and bid online, visit HA.com/5192 73003 HEMATITE âSWORDâ Jackson Mine, Negaunee, Marquette Iron...Iron Range, Marquette Co., Michigan, USA Hematite is one of the main ores of Iron mined for the steel industry...Altamira, Spain, etc. âNeedleâ Hematite is one of the more unusual forms of Hematite with only a few localities...LARGE AMETHYST GEODE: âMICKEY MOUSEâ Artigas, Artigas Department, Uruguay The term âPorta Joiaâ in Portuguese |  | | Book | | Treasured Minerals Calcite and Amethyst from Uruguay This closeup shows a group of water-clear calcite... This specimen and the next one were found in Artigas. Stalagmites of deeply colored amethysts such as...mined by Arlindo in 1992 in the La Mojarro Mine in Artigas. It is actually a coating of amethyst crystals...striped with amethyst from the Santino Mine in Uruguay. At around 40 pounds, it is also my largest specimen...they are the most highly regarded specimens from Uruguay. A skunk sitting next to a stalactitic amethyst |  | | Journal (issue) | | of Vadim Fedder; photos by Matteo Chinellato. Department of the University of Milan. We used a JEOL JXA-8200...range were performed at the Materials Science Department of the University of Milan-Bicocca with a PerkinElmer...is a postdoctoral fellow in the Earth Sciences Department at the University of Milan. Dr. Diella is a senior...Pogliani and Dr. Giorgio Spinolo (Materials Science Department, University of Milan-Bicocca) for assistance...variety sunstone was originally associated with hematite-bearing feldspars from India, Norway, and Tanzania |  | Götze, Jens, Hofmann, Beda, MachaĆowski, Tomasz, Tsurkan, Mikhail V., Jesionowski, Teofil, Ehrlich, Hermann, Kleeberg, Reinhard, Ottens, Berthold (2020) Biosignatures in Subsurface Filamentous Fabrics (SFF) from the Deccan Volcanic Province, India. Minerals, 10 (6) 540 doi:10.3390/min10060540 | Journal (article/letter/editorial) | | in remarkable found the amethyst geodes of Artigas in Uruguay [6] and pseudo-stalactite aggregatesparts...stalactites were found in the amethyst geodes of Artigas in Uruguay [6] and pseudo-stalactite aggregates were...of 40 minerals (ilmenite-rutile-leucoxene and hematite). In the transition to zone 2, di- and trioctahedral...of ore minerals (ilmenite-rutile-leucoxene and hematite). In the transition to zone 2, di- and trioctahedral...H.A. The genesis of the amethyst geodes at Artigas (Uruguay) and the paleohydrology of the GuaranĂ aquifer: |  | | Journal (article/letter/editorial) | | Amethyst with minimal subsurface inclusions of hematite from the Thunder Bay Amethyst mine, collected...often distinctive due to microscopic subsurface hematite inclusions that, when abundant, can impart a pronounced...specimen material on the market from Brazil and Uruguay. In recent years, however, the presence of quality...Chalcopyrite (1,2,3,5) Galena (1,2,5) Marcasite (1,2,5) Hematite (4) Kaolinite (3) Pyrite (1) Quartz; Quartz v...Confirmed Calcite (5) Kaolinite (3) Goethite (5) Hematite (4) Pyrite (5) Quartz; Quartz v. Amethyst (5) |  | | Catalog/List | | beguiling in a strange way. Near the base is a Hematite Eisenrose doing its best to appear inconspicuous...the back, that can just be an iron stain or some Hematite that co-deposited with the Manganite. Condition... October 19, 2013 | 12:00 PM CTââ 115 53135 HEMATITE West Cumberland Iron Field, North and Western...to blame for the common term for this type of Hematite: Kidney Ore. During the period when Iron mining...Provenance: Western Minerals, ex. University of Chicago Department of Geological Sciences [Hoppel # D1159] Estimate: |  | | Catalog/List | | Kevin 67 Native Lima Ex Silver on Matrix. Department, Edu âar Estimated qt [ at id From the... vith Province, 1 - 1.5 cm Lima calcite Department, Peru; mea O00. / a, } n mining (the...Chivor, displays Boyaca beautifully, front Department, or a deep emerald bac k. Colombia; by 2... 12.2 cm by Red-brown Hematite and Quartz Crystals with Lustrous Hematite Rosettes. A tremendous cabinet...side lhe wire left size of all Mine, Boya« a Department, Colombia; measures 2.6 cm From the Elura |  | Ottens, Berthold, Götze, Jens, Schuster, Ralf, Krenn, Kurt, Hauzenberger, Christoph, Zsolt, BenkĂł, Vennemann, Torsten (2019) Exceptional Multi Stage Mineralization of Secondary Minerals in Cavities of Flood Basalts from the Deccan Volcanic Province, India. Minerals, 9 (6) 351 doi:10.3390/min9060351 | Journal (article/letter/editorial) | | babingtonite, prehnitepumpellyite, julgoldite, hematite, and pyrite. Vrâvery rare; rârare;coâoccasionally;...[55]. Isotopic measurements were done at the Department of Lithospheric Research at the University of...presentcontains everywhere grain boundaries. Those by hematite were contains derived from by their Roundishrespectively...pseudomorphs after olivine exhibited mash Those formed by hematite were derived from olivine as indicated by their...the flood basalts of the Arapey formation at Artigas (Uruguay) contain fabrics, explained as stalactites |
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